How do you know if something represents a proportional relationship

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Hey there!
An equation has a proportional relationship if it fulfills the following:
-Is a linear function, meaning that is is graphed as a line all the way across a graph.
-It goes through the origin. So the point (0,0) has to be one solution to the equation.
That is how you can identify a proportional relation, a linear equations passing through the origin.

Hope this helps!